Revolve has the best website design and model pictures. I like the customer Instagram inspirations.
I would spend a lot of time on the website. The quality isn't always great, depends on the brands. Delivery is not as fast as Shopbop, but is quite acceptable (5-7 days international shipping), no extra taxes charged at my door.
You can ask for a price difference refund if they adjusted the price 1-2 days after you purchased.